US5408273A - Muting circuit for a television receiving set - Google Patents
Muting circuit for a television receiving set Download PDFInfo
- Publication number
- US5408273A US5408273A US08/072,703 US7270393A US5408273A US 5408273 A US5408273 A US 5408273A US 7270393 A US7270393 A US 7270393A US 5408273 A US5408273 A US 5408273A
- Authority
- US
- United States
- Prior art keywords
- caption
- mute
- state
- muting
- key input
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/47—End-user applications
- H04N21/488—Data services, e.g. news ticker
- H04N21/4884—Data services, e.g. news ticker for displaying subtitles
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/47—End-user applications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/44—Receiver circuitry for the reception of television signals according to analogue transmission standards
- H04N5/60—Receiver circuitry for the reception of television signals according to analogue transmission standards for the sound signals
Definitions
- This invention relates to a muting circuit used for a television receiver et al., and, more specifically, to a muting circuit which provides a means to output, when the audio signal is muted, information relating to the audio signal in the form of a character display.
- a muting circuit In recent years, increased performance of audio-visual apparatus has been pursued.
- a muting circuit In a television receiving set, a muting circuit is useful as it can eliminate acoustic output while maintaining the image when, for instance, a phone call is received or a child begins to sleep.
- Conventional technology relating to muting circuits which are used in a television receiver is explained below referring to the drawing.
- FIG. 2 is a block diagram of a conventional muting circuit, which involves a mute key input 7, a mute-judging part which achieves either muting or non-muting based upon the mute key input, and an audio output circuit 9 which outputs sound responsive to appropriate signals provided by the mute-judging part 8.
- the mute-judging part 8 initiates muting of the acoustic output circuit.
- the conventional structure as mentioned had a shortcoming, however, namely, when an appropriate mute key input signal is applied and the sound is suppressed, any information contained in the audio output (e.g. speech content) is unavailable to the television viewer.
- a muting circuit for a TV receiver set which, when muted, provides closed caption information relating to the content of the audio output on the screen.
- the muting circuit comprises a mute-judging part to evaluate a mute key input signal, a caption-judging part to evaluate the caption key input signal and the state of the mute-judging part, a caption output circuit receiving appropriate signalling from the caption-judging part to control the closed caption, and an audio output circuit which receives appropriate signalling from the mute-judging part to control the output acoustic volume.
- the mute-judging part generates signals corresponding to a muting state and mute-releasing state alternately every time the mute key input signal is received, and the audio output circuit reduces the output acoustic volume level to zero decibels or a previously set low level in the mute state and recovers the audio output level in a mute-releasing state.
- the caption-judging part enters a caption ON state and a caption OFF state alternately every time it receives the caption key input signal.
- the caption-judging part can also be set, when the mute-judging part is in a muting state, to either be in a caption ON state or a caption OFF state regardless of the caption key input signal.
- the caption output circuit displays closed caption information on the screen.
- FIG. 1 is a block diagram of a muting circuit in accordance with an exemplary embodiment of the present invention.
- FIG. 2 is a block diagram of a conventional muting circuit.
- the muting circuit comprises, a mute key input 1, a mute-judging part 2, an acoustic output circuit 3, a caption key input 4, a caption-judging part 5, and a caption output circuit 6.
- the mute-judging part 2 determines, based upon a signal, which entered mute key input 1, whether the audio output signal should be muted, the acoustic-output circuit 3 determines and adjusts the volume of the acoustic output according to information obtained from the mute-judging part 2, the caption-judging part 5 determines the caption mode based upon the caption key input 4 and information received from the mute-judging part 2, and the caption output circuit 6 controls the closed caption display based upon information received from the caption-judging part 5.
- the mute-judging part 2 When the mute key input 1 receives an appropriate input signal, the mute-judging part 2 initiates muting.
- the mute key input 1 receives a further input signal
- the mute-judging part 2 interprets this as a request to conclude muting, and the acoustic output circuit 3, with this information, restores the previous volume of sound.
- the caption-judging part 5, after receiving appropriate signals from the mute-judging part 2, generates an appropriate signal to place the caption mode in an OFF state.
- the caption output circuit 6 enters a caption OFF state, causing the caption on the display to disappear. This sequence is repeated every time the mute key input 1 receives an input signal.
- the caption-judging part 5 When the mute-judging part 2 is in mute-release state and the caption mode of the caption-judging part 5 is an OFF state, if the caption key input 4 receives an appropriate input signal, the caption-judging part 5 enters a caption OFF stated and, if the caption key input 4 receives a further input signal, then the caption mode enters an OFF state. If in this state, an appropriate input signal enters the mute key input 1, the mute-judging part 2 determines that muting should occur, and the caption-judging part 5, after receiving appropriate signals from the mute-judging part 2, determines that the caption should appear, and displays the caption on the screen via the caption-output circuit 6. If the caption key input 4 receives a further input signal, the caption-judging part 5 can end the display of the caption, regardless of the state of the mute-judging part 2.
- mute-judging part 2 When the mute-judging part 2 is in a mute-release state and the caption mode of the caption-judging part 5 if OFF, if the caption key input 4 receives an appropriate input signal, then the caption-judging part 5 enters a caption ON state. If the caption key input 4 receives a further appropriate input signal, then the caption mode enters an OFF state. If in this state, an appropriate input signal is received by the mute key input 1, then the mute-judging part 2 initiates muting, and the caption-judging part 5, with appropriate signals from the mute-judging part 2, enters a caption mode ON state.
- the caption-judging part 5 may keep the caption mode in an ON state neglecting the caption key input signal, as long as the mute-judging part is in mute state if such mode of usage is preferred.
- the caption-judging part 5 When the mute-judging part is in an OFF state, and the caption-judging part 5 is already in a caption mode ON stated if the mute key input 1 receives an appropriate input signal, then the caption-judging part 5 is maintained in a caption mode ON stated and even if the caption key input 4 receives a further input signal, the caption-judging part 5 is maintained in a caption mode ON state despite the input signals which are transmitted to the caption key input 4, as long as the mute-judging part 2 is in a mute state.
- This priority state is released by a further input signal which is transmitted to the mute key input 1. That is, the caption ON state is maintained, as long as the mute state is maintained.
- the above two cases may be set when the equipment is manufactured or may be set to be changeable depending on the preference of the user.
- the conventional muting circuit with a caption-judging part 5 and a caption output circuit 6 which can place the caption mode in an ON state when being muted, an appropriate caption is displayed while the sound is muted.
- Generation of the mute key input signal or the caption key input signal may be obtained either directly or through remote control means.
- the muting state is not confined to a zero-volume sound. Low volume sound may also be obtained.
- a muting circuit comprises a mute-judging part which evaluates a mute key input signal, a caption-judging part which selectively enters a caption mode based upon a caption key input signal and the state of the mute-judging part, a caption output circuit evaluating the state of the caption-judging part and controlling the closed caption display, and an acoustic output circuit which receives signals indicative of the state of the mute-judging part, adjusts the output sound volume, and, when the muting state is set; displays on the screen the sound content.
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Television Systems (AREA)
- Studio Circuits (AREA)
- Television Receiver Circuits (AREA)
- Circuits Of Receivers In General (AREA)
Abstract
Description
Claims (7)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4-147249 | 1992-06-08 | ||
JP4147249A JP2964777B2 (en) | 1992-06-08 | 1992-06-08 | Mute circuit |
Publications (1)
Publication Number | Publication Date |
---|---|
US5408273A true US5408273A (en) | 1995-04-18 |
Family
ID=15425962
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US08/072,703 Expired - Lifetime US5408273A (en) | 1992-06-08 | 1993-06-07 | Muting circuit for a television receiving set |
Country Status (2)
Country | Link |
---|---|
US (1) | US5408273A (en) |
JP (1) | JP2964777B2 (en) |
Cited By (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5477277A (en) * | 1993-01-26 | 1995-12-19 | Mitsubishi Denki Kabushiki Kaisha | Apparatus and method for controlling the muting of sound and the display of audio information on a television receiver |
WO2000064149A1 (en) * | 1999-04-15 | 2000-10-26 | Onnara Electronics Corp. | An apparatus and method for controlling caption of video equipment |
US20010034741A1 (en) * | 1997-10-21 | 2001-10-25 | Bray J. Richard | Automated language filter for home TV |
US20020007371A1 (en) * | 1997-10-21 | 2002-01-17 | Bray J. Richard | Language filter for home TV |
EP1251693A2 (en) * | 2001-04-19 | 2002-10-23 | Thomson Licensing S.A. | Method and apparatus for control of auxiliary video information display |
EP1633142A1 (en) * | 2004-09-07 | 2006-03-08 | NEC Corporation | Portable television phone adapted to display subtitles when the silent mode is activated |
WO2006085845A1 (en) * | 2005-01-31 | 2006-08-17 | Thomson Licensing | Method and apparatus for enabling the display of a text service upon audio muting |
US20060221257A1 (en) * | 2005-03-29 | 2006-10-05 | Kabushiki Kaisha Toshiba | Broadcast receiver |
US7139031B1 (en) | 1997-10-21 | 2006-11-21 | Principle Solutions, Inc. | Automated language filter for TV receiver |
US20100066904A1 (en) * | 2008-09-18 | 2010-03-18 | Vizio, Inc | Synchronizing operational states of closed captioning and audio mute |
CN102625068A (en) * | 2012-02-24 | 2012-08-01 | 深圳创维-Rgb电子有限公司 | Closed caption display method and TV set |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4554584A (en) * | 1983-07-08 | 1985-11-19 | Elam Carl M | Video and audio blanking system |
JPH01126083A (en) * | 1987-11-11 | 1989-05-18 | Sanyo Electric Co Ltd | Voice selection circuit |
JPH0429478A (en) * | 1990-05-23 | 1992-01-31 | Mitsubishi Electric Corp | Video signal masking device |
US5128987A (en) * | 1989-01-23 | 1992-07-07 | John Sheridan | Telephone-responsive device for muting the sound output of a television set |
US5327176A (en) * | 1993-03-01 | 1994-07-05 | Thomson Consumer Electronics, Inc. | Automatic display of closed caption information during audio muting |
-
1992
- 1992-06-08 JP JP4147249A patent/JP2964777B2/en not_active Expired - Fee Related
-
1993
- 1993-06-07 US US08/072,703 patent/US5408273A/en not_active Expired - Lifetime
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4554584A (en) * | 1983-07-08 | 1985-11-19 | Elam Carl M | Video and audio blanking system |
US4554584B1 (en) * | 1983-07-08 | 1998-04-07 | Browne Lee H | Video and audio blanking system |
JPH01126083A (en) * | 1987-11-11 | 1989-05-18 | Sanyo Electric Co Ltd | Voice selection circuit |
US5128987A (en) * | 1989-01-23 | 1992-07-07 | John Sheridan | Telephone-responsive device for muting the sound output of a television set |
JPH0429478A (en) * | 1990-05-23 | 1992-01-31 | Mitsubishi Electric Corp | Video signal masking device |
US5327176A (en) * | 1993-03-01 | 1994-07-05 | Thomson Consumer Electronics, Inc. | Automatic display of closed caption information during audio muting |
Non-Patent Citations (6)
Title |
---|
"Mulhport for ATV?" Consumer Electronics, Dec. 18, 1989, P. N/A. |
"New VCRs Compatable With VHS, VHS-C Formats" Times Union (AL)-Thursday May 16, 1991, Jonathan Takiff Knight-Rider. |
High Tech Closed Captioned TV Not Just For Hearing Impared Anyone Daily News of Los Angeles (LA) Thursday , May 13, 1993 by Jonathan Takiff, p. L. 23, Edition VALL Section, LA FIFE. * |
High Tech Closed-Captioned TV Not Just For Hearing-Impared Anyone "Daily News of Los Angeles (LA)-Thursday", May 13, 1993 by Jonathan Takiff, p. L. 23, Edition VALL Section, LA FIFE. |
Mulhport for ATV Consumer Electronics, Dec. 18, 1989, P. N/A. * |
New VCRs Compatable With VHS, VHS C Formats Times Union (AL) Thursday May 16, 1991, Jonathan Takiff Knight Rider. * |
Cited By (22)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5477277A (en) * | 1993-01-26 | 1995-12-19 | Mitsubishi Denki Kabushiki Kaisha | Apparatus and method for controlling the muting of sound and the display of audio information on a television receiver |
US20010034741A1 (en) * | 1997-10-21 | 2001-10-25 | Bray J. Richard | Automated language filter for home TV |
US20020007371A1 (en) * | 1997-10-21 | 2002-01-17 | Bray J. Richard | Language filter for home TV |
US6867818B2 (en) | 1997-10-21 | 2005-03-15 | Principle Solutions, Inc. | Automated language filter for home TV |
US6972802B2 (en) | 1997-10-21 | 2005-12-06 | Bray J Richard | Language filter for home TV |
US7139031B1 (en) | 1997-10-21 | 2006-11-21 | Principle Solutions, Inc. | Automated language filter for TV receiver |
WO2000064149A1 (en) * | 1999-04-15 | 2000-10-26 | Onnara Electronics Corp. | An apparatus and method for controlling caption of video equipment |
EP1251693A2 (en) * | 2001-04-19 | 2002-10-23 | Thomson Licensing S.A. | Method and apparatus for control of auxiliary video information display |
US20020154246A1 (en) * | 2001-04-19 | 2002-10-24 | Hawkins Bret David | Method and apparatus for control of auxiliary video information display |
EP1251693A3 (en) * | 2001-04-19 | 2004-03-17 | Thomson Licensing S.A. | Method and apparatus for control of auxiliary video information display |
US20060051053A1 (en) * | 2004-09-07 | 2006-03-09 | Nec Corporation | Portable terminal and control method for same |
EP1633142A1 (en) * | 2004-09-07 | 2006-03-08 | NEC Corporation | Portable television phone adapted to display subtitles when the silent mode is activated |
US7633516B2 (en) | 2004-09-07 | 2009-12-15 | Nec Corporation | Portable terminal and control method for same |
WO2006085845A1 (en) * | 2005-01-31 | 2006-08-17 | Thomson Licensing | Method and apparatus for enabling the display of a text service upon audio muting |
US20090122131A1 (en) * | 2005-01-31 | 2009-05-14 | Mark Gilmore Mears | Method and Apparatus for Enabling the Display of a Text Service upon Audio Muting |
US8804047B2 (en) | 2005-01-31 | 2014-08-12 | Thomson Licensing | Method and apparatus for enabling the display of a text service upon audio muting |
US20060221257A1 (en) * | 2005-03-29 | 2006-10-05 | Kabushiki Kaisha Toshiba | Broadcast receiver |
US7659942B2 (en) * | 2005-03-29 | 2010-02-09 | Kabushiki Kaisha Toshiba | Broadcast receiver |
US20100066904A1 (en) * | 2008-09-18 | 2010-03-18 | Vizio, Inc | Synchronizing operational states of closed captioning and audio mute |
US9131191B2 (en) | 2008-09-18 | 2015-09-08 | VIZIO Inc. | Synchronizing operational states of closed captioning and audio mute |
CN102625068A (en) * | 2012-02-24 | 2012-08-01 | 深圳创维-Rgb电子有限公司 | Closed caption display method and TV set |
CN102625068B (en) * | 2012-02-24 | 2014-05-07 | 深圳创维-Rgb电子有限公司 | Closed caption display method and TV set |
Also Published As
Publication number | Publication date |
---|---|
JPH05344435A (en) | 1993-12-24 |
JP2964777B2 (en) | 1999-10-18 |
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STPP | Information on status: patent application and granting procedure in general |
Free format text: APPLICATION UNDERGOING PREEXAM PROCESSING |
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AS | Assignment |
Owner name: MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD., JAPAN Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:OKAMURA, MASAHIKO;REEL/FRAME:006663/0188 Effective date: 19930817 |
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